I am not personally the biggest fan of the true gay bath houses. They do tend to be very dark and sleezy.
However, I really do enjoy Korean spas and have been to a couple in several different cities in the country. Note, they are not for sex. But still a lot of fun and very relaxing to hang out in. They are all very similar in setup. Everyone strips naked in the locker room and enters a very large open area containing saunas and stream rooms along the side with various pools/hot tubes of different temperatures in the middle. When you enter, there are a wall of shower heads with no dividers or anything and you shower off in full view of everyone relaxing in the pools. Basically no one cares about any sense of modesty with towels. In the sauna and steam rooms, nearly everyone sits on top of their towel with no covering. Crowd tends to be 20ish guys at a time in the wet area, sometimes busier. Mix of everything from young to old, fat to skinny. You can pick up pretty easily on which guys are “cruising.” You get great looks at everyone when they are just sitting across from you with everything loosely hanging out. When you are alone with someone interested in one of the more private areas of the sauna/steam room, no uncommon to get hard together, compare dicks, stroke each other a bit. For instance, I was about 30 and one older guy was definitely noticing my genitals. “You are pretty well hung there, how big does it get?" I said 6.5, and he said he thought that was an understatement and wanted to see. So I got hard, he complimented me and moved next to me to feel for himself.
Along one side of the wet area is typically an area with a could like massage tables for body scrubs. These feel great, and are also done in full view of everyone else. At some places, a washcloth is placed over your genitals, at others nothing. Some places genitals are washed quickly with the loofah, one place was a little more. The fairly obviously gay attendant asked me, “Is it okay if I move some stuff around?" (clearly meaning my genitals) to which I said yes. He immediately soaped me up and I was completely erect. He washed my erect penis almost by giving it a couple strokes, then my scrotum including stretching it down causing my erection to be pulled straight up in the air, then moved on. No telling who was watching. Some places there are multiple tables next to each other, and as you progress through being on your back, left side, right side, stomach, you can get views of them lying there naked getting washed and know that they are seeing you in the same position.
Again, no sex here and even quite touches and hjs are super discrete. However, very relaxing and a great place to show off what youve got and to see a wide variety of others hanging out naked.